I agree with you that if you get clean, things will get better. How badly do you want to get clean? That's the deciding factor in making a turn-around in your life.
Jobs...lack of them...lack of interviews even with a degree...nobody is immune in this economy. I have a friend with a master's degree in engineering who worked at Micky-D's flipping burgers for a year - another who delivered pizzas.
My suggestion: get clean first, re-build that family trust, get a handle on the depression with your dr.
To get a job first would just distract you from getting to the core your recovery. If your parents can help you through the recovery process, the job will follow and it'll be worth the wait.
Just my opinion. All the best to you. Please keep us posted and welcome!